Inspection apparatus guide system

摘要

A valve body 118 in a passage 116 of a housing 110 connected to a through hole 14 in a sealed machine casing 12 can allow an inspection apparatus 106 into an interior of the casing 12 when open, and prevents fluid flow through the passage 116 when closed. Seals can engage the inspection apparatus to prevent fluid flow through the passage 116 during inspection or inspection apparatus movement. A guide conduit 200 in the casing 12 can include branches and can guide the inspection apparatus 106 to multiple inspection sites. Guide marks can identify the branches to assist with navigation within the casing 12.